321402097 has 2 divisors, whose sum is σ = 321402098. Its totient is φ = 321402096.

The previous prime is 321402077. The next prime is 321402113. The reversal of 321402097 is 790204123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279424656 + 41977441 = 16716^2 + 6479^2 .

It is a cyclic number.

It is not a de Polignac number, because 321402097 - 2²³ = 313013489 is a prime.

It is not a weakly prime, because it can be changed into another prime (321402047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160701048 + 160701049.

It is an arithmetic number, because the mean of its divisors is an integer number (160701049).

Almost surely, 2^321402097 is an apocalyptic number.

It is an amenable number.

321402097 is a deficient number, since it is larger than the sum of its proper divisors (1).

321402097 is an equidigital number, since it uses as much as digits as its factorization.

321402097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 321402097 is about 17927.6907882750. The cubic root of 321402097 is about 684.9879032442.

The spelling of 321402097 in words is "three hundred twenty-one million, four hundred two thousand, ninety-seven".